PM Modi says ISRO is planning to launch satellite Aditya to study Sun

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News: Prime Minister Narendra Modi has said that ISRO is planning to launch a satellite called Aditya L1 to study the sun.

Facts:

About Aditya L1

  •  It will be India’s first satellite to study the sun. It is scheduled to be launched in 2021 aboard a Polar Satellite Launch Vehicle (PSLV-XL) from Sriharikota, Andhra Pradesh.
  • Aim: To study the Sun’s corona (outer layer of the sun) from a halo orbit around the Sun-Earth Lagrangian point 1.
  •  Objectives:

o   Realization and launch of a satellite in a Halo orbit around L1,

o   Understanding solar upper atmospheric (chromosphere and corona) dynamics,

o   Study of chromospheric and coronal heating and

o   Observe the in-situ particle and plasma environment to provide data for the study of particle dynamics from the Sun.

Additional Information:

Lagrangian points:

  • Lagrange points are the locations where the combined gravitational pull of two large masses roughly balance each other. Any small mass placed at that location remains at a constant distance relative to the large masses.
  • There are 5 such points as shown in the diagram.
  • The path followed by an artificial satellite around a Lagrange point is known as Halo orbit.

Coronal Mass Ejections: It is a significant release of plasma and accompanying magnetic field from the solar corona.

Solar Flare: It is an increased brightness on the Sun, usually observed near its surface and in close proximity to a sunspot group.